H Band is your companion app for your smart accessories. The easy synchronization with your smart watch allows you to track all your activities. H Band creates a data history for you, so even after weeks you have a detailed overview over your past exercises，H Band collects location data to enable ["synchronized weather"], ["movement track record"],["reconnect device"] ，even when the app is closed or not in use if you have problem,see the youtube video https://www.youtube.com/channel/UCzdhUKsYfSYWXmk2CwGaZjw